60GHz multi-antenna system for shading and eluding and signal processing method thereof

The invention discloses a 60GHz multi-antenna system for shading and eluding and a signal processing method thereof. Under the condition that no shading happens, the system determines a preferred antenna sub-array by optimization and selection of antenna sub-arrays, and performs high-speed data transmission by combining beam-forming technology; and when the preferred antenna array is shaded by a barrier, the system evaluates elements in preferred antenna selection history according to the shading effect of the barrier on the antenna array, and selects one element as the preferred antenna sub-array for replacing a spare antenna subset. The selection of the spare antenna sub-array enables the system to automatically avoid the barrier so as to maintain the connectivity of a link and the performance of the system as far as possible. When the shading is eliminated, the optimal performance can be recovered when the shading does not exist by switching to the primary preferred antenna subset. The shading and eluding method implemented by the system disclosed by the invention does not need channel estimation or extra iterative process, and has simple calculation and quick switch. Simulation experiments show that the spare antenna searching method is efficient under the condition of great optimized search space, can quickly make response according to the barrier, and improves the robustness of the system during shading.